The PD98401A (NEASCOT-S15TM) is a high-performance SAR chip that segments and reassembles ATM cells. This chip can interface with an ATM network when it is included in a workstation, computer, front-end processor, network hub, or router. The PD98401A conforms to the ATM Forum Recommendation, and provides the functions of the AAL-5 SAR sublayer and ATM layer. The PD98401A is compatible with its predecessor, PD98401, in terms of hardware and software. Functions are explained in detail in the following User's Manual. Be sure to read this manual when designing your system.